A nut having 6 flat sides and an integral washer which extends beyond the flats or periphery.
NSN 5965-01-484-2743
NSN 5998-00-267-8134
NSN 5915-01-221-6482
NSN 4140-00-113-1279
NSN 5925-01-469-5498
NSN 5960-00-529-0583
NSN 6240-01-553-0561
NSN 5855-00-532-0025
NSN 5935-01-564-5360
NSN 5920-00-357-0260
NSN 6110-01-161-1087
NSN 5950-01-547-2693